Pinch bar



F. Nl. KIDDER.

PINCH BAH.

APPLICATION FILED APR. 11. 192|.

Patented Apr. 4, 1922.

f 3 ehbo/o reni) M. KIDDER, or WARREN, rnivivsvnvaivra.

izjaiaocr.'

Applicatioiiled April 11, 1921. Serial No. 4605268.

Improvements in PinchvBars, of which thek following isa specification.

This invention relates tov an improved pinch-bar for movingl railway cars when it is desired to shift'them from one locatio-n to another as, for example, upon switches and side tracks at railway v'stations or'industrial plants. f I y The chiefobjects of my invention `are to provide a pinch-bar which is adapted to be applied with equal facility and effectiveness to rails of different dimensions and which 1s adapted to grip the rail tighter as lthe force applied thereto for moving the car increases. Other objects of the invention consisting of novel vfeatures of construction and arrangements of parts will becomeapparent as the description proceeds. The 'invention is described in connection with the accompanying drawings, in which 'Figure 1'is a side elevation of the pinchbar. l

Fifgure 2 ris a vertical 4section on the line 2-2 of Figure 1 looking iii the direction of the arrows, andr showing the device applied to the T-head of a rail.

Figure 3 is a top plan view 4of the device.

The numeral 10 designates the body ineinber of the pinch-bar whichis provided vwith a central longitudinal slot 11 in vwhich'the lowerend ofthe lever l'12V isadapted to op crate'.Y The lever 12intermediate vits ends is formed with a boss 13 having anapertur'eilat extending therethrough .through which extends a pin 15 and the ends of the latter pass through transverse vertical slots 16 formed inthe body member 10v and intersecting the longitudinal slot 11 at right angles.

The body` member V10 is provided with pairsy of spaced lugs 17, 18 between which are insertedthe gripping dogs 19, having apertures therein adapted jto` align with apertures in said lugs 17 vand '18 for receiving the pivot pins 21, the latter being retained 4in place-by the heads 22 and the cotter pins 23 which pass through a transverse aperture formed near one end of each pin. The lower ends of the dogs 19 and20 project below-the body member 10 and are provided with re-V cesses for receiving the hardened face plates 24 which are adapted to engage againstV the sides of the Tv-headof the Vrailwhen the device is in operative position, as shown in F ig.

Y, Specification of Letters Patent. Apr, 4, 192:2. I

2. The hardened `face plates are retained in position by means of set screws25. The dogs 19 and 20 are `extended above their pivots 21 and provided with inclined faces 26 which i preferably make an angleI of about-63o vwith the horizontal fwhen theface plates 2li are vertical. The pins 15 have rounded ends 27 adaptedto engage the inclined faces 26 ofv the dogs19 and v20 and thereby v'form apivot vf pin for the lever 12. With this construction it -is evident that as the downward pressure' f V-V y on the-lever 12 increases, the plates-24 will f be forced intol tighter contact with theV T- head ofthe rail 28. I

lnorder to release the `dogs `from 'their' gripping engagement withthe rail, when the downward .pressure on the operating lever is released-,9 coil springs v29 are provided y,be-

tween the dogsvan'd body 'member 10 and for 'Y i this purpose recessesl() are formed in the dogs to receive one end of the springs and recesses 31 are formed inthe body member for partially housing and forming abutinents for the other end of these springs.

v /The vertical?'longitudinal slot 11 in the body membery is terminated'at onefend by a solid toe piece 33 `which is adapted to Ibe ink Y serted under the" wheel until ,it 'contacts therewith and is'provided with a Hat bottom surface aadapted to slide on top of therail. The llcwerend ofthe lever 12 isforkedand a shoe 35 is pivotally connected to theforked' Y extremity by means of the aperturedlug 36 v ofth'e'shoe 'being insertedtherein and pivot!V ally connected: thereto byinean's 'of a l pin 37.

The slot -11 terminates at the rear in avsolid portion 3S which vforms the yheel 'of the body member and this heelV isprovded with va-A tra-nsverse slotfini'which is' inserted aplate 89yhavinga knife edge /lOadapted toproject beyond lthelower surface Vofthe heel and engage the vrail/'head soas toiaid in preventing formedin'the'heel'i38 and aiset'screw ,451 engagingthereinmaintains.'tlie plate '39 poi' sition. VThe upper portionY of the lever 12 is formed as a socket-42 for receiving a suitable detachable handle to V- give proper leverage for operating the pinch-bar.

In operation the toe 33 is moved close to 'd the point of contact between the wheel'of the car to be moved and the rail with the body member so placed that the Hat surface iio y,

34 and the knife edge 40 bear upon the T- head of the rail. Thesprings 29, act to maintain the gripping dogs in released position until a downward force is exerted upon the lever l2. Under-these conditions the pinV usually encountered in practice, the only effeet of the different dimensions of the rails being that the pin l5 will take up a lower or higher position on the surfaces 26 accord- Y ing as the rail head is narrow or wide. Pressure exerted on the lever 12 will tend to urge the dogs more firmly into gripping engagement with the rail and the shoe 35 engaging against the periphery of the wheel of the car will cause the latter to Arotate after which the operating lever is raised, the springs 29 release the dogs and the body member l0 may he slid along the top of the rail to a new position-when this same action is repeated whereby the car is kept in motion until it is moved the desired distance. Should the Ybody member be left on the rail the car tending to move backward will engage the toe-thereof and the knife edge al() will bite intothe rail with sufficient force to prevent rearward motion of the car.

It will be understood that the particular constructiondescribed and shown has been chosen for illustrative purposes merely and that the invention as defined by the claims hereunto appended, may be otherwise em` bodied and applied without departing from the spirit and scope-thereof.

Having describedv my invention what lv claimk as new and desire to .secure by Letters Patent, is

V.1. A pinch bar for moving cars, comprising a body member having a longitudinal slot andtransverse)vertical slots formed therein, an operating lever adapted vto move in said longitudinal slot, rail gripping' dogs pivoted to the member for oscillatory move,- mentin said transverse slots, said dogs having inclined upper faces, and a pivot pin for said operating lever .passing through said transverse slots and bearing at opposite ends onV the inclined faces of said dogs.

2. 'A pinch bar for moving cars, comprising aY body member having .a rail engaging surface,` pairs of' spaced lugs projecting from opposite sides of saidmember, gripping dogs intermediately pivoted in said lugs, spring means for yieldingly holding Said dogs in released position, said gripping y dogs having inclined upper faces, an operating lever, and a pivot pin for said lever' f adapted to engage the inclined faces of said Adogs whereby said dogs are forced into tighter contact with said rail as the operat-` forced Vinto tighter contact with said rail asYV the pressure on said pin 1ncreases,and`

spring means tending to maintain said dogs in released position.

4. A pinch bar for moving cars, comprisn ingv a body member having a longitudinal slot and transverse vertical slots formedtherein, an operating lever adapted to move.A

in said longitudinal slot, rail gripping dogs pivoted to the member for oscillatory movement in said transverse slots, said dogs having inclined vupper facesand a pivot pin for said operating lever adapted to move vertically in said transverse slots and Abear at opposite ends on the inclined faces of said dogs, whereby said dogs may grip rails of` different dimensions with vequal effectiveness. f l

5. A pinch bar for moving cars comprising a body member having a longitudinal slot formed therein, the front end ofsaid member having a rail engaging surfaceVrail gripping dogs 'intermediately pivotedon said body member, saiddogs having inclined upper faces, an operating lever, a shoe pivotedV to one end o'f-said lever for engaging a wheel `cfa-car, anda pivot pin for said operating lever adapted 'to engage thepin-y clined .faces oflsaid dogs whereby said dogs are forced into tighter contact with said rail as the operating pressure end of said lever increases. Y lFRED KIDDER Witnesses: l d A L. H. BURKIrART, Y NV. F. BENNETT.

on theV other 

